Debt Instrument Maturity Year

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM format.

+ References

No definition available.

+ Details

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- Definition

Date the credit facility terminates, in CCYY-MM format.

+ References

No definition available.

+ Details

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- Definition

The senior notes were issued at a percentage of par (less than 100% of par results in a discount).

+ References

No definition available.

+ Details

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

+ Details

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Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Description of debt redemption features under terms of the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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Balance Type:	na
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

+ References

+ Details

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- Details

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Debt - Additional Information (Detail)		1 Months Ended	6 Months Ended	12 Months Ended
Debt - Additional Information (Detail)	Dec. 15, 2015	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2016 EUR (€)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 EUR (€)
Debt Instrument [Line Items]
Accrued expenses and other current liabilities		$ 1,065,251,000	$ 1,065,251,000	$ 1,469,725,000
Other long-term liabilities		322,098,000	322,098,000	314,432,000
Senior Notes
Debt Instrument [Line Items]
Accrued interest related to senior notes		62,000,000	62,000,000	52,000,000
Credit Facility
Debt Instrument [Line Items]
Credit facility		1,500,000,000	$ 1,500,000,000	$ 1,000,000,000
Line of credit facility, expiration date			2021-02	2019-09
Credit facility borrowings outstanding		0	$ 0	$ 0
Interest, on drawn amount			LIBOR plus 137.5 basis points
Commitment fee on undrawn amounts			0.175%
Basis points added to LIBOR rate			1.375%
Letters of credit issued under the credit facility		21,000,000	$ 21,000,000	29,000,000
Uncommitted Credit Facility \| International Subsidiary One
Debt Instrument [Line Items]
Credit facility \| €					€ 50,000,000
Credit facility borrowings outstanding \| €					€ 10,000,000		€ 20,000,000
Uncommitted Credit Facility \| International Subsidiary Two
Debt Instrument [Line Items]
Credit facility		5,600,000	5,600,000
Credit facility borrowings outstanding		5,000,000	5,000,000	5,000,000
Home Away Inc
Debt Instrument [Line Items]
Debt, interest rate	0.125%
Debt instrument redemption price percentage	100.00%
Convertible senior notes maturity year	2019
Accrued expenses and other current liabilities				$ 402,500,000
Other long-term liabilities		1,000,000	1,000,000
Home Away Inc \| Convertible Notes Payable
Debt Instrument [Line Items]
Debt, amount repurchased						$ 401,000,000
7.456% Senior Notes Due 2018
Debt Instrument [Line Items]
Senior unsecured notes principal amount		$ 500,000,000	$ 500,000,000
Senior notes, maturity date			2018-08
Debt, interest rate		7.456%	7.456%		7.456%
Debt instrument redemption price percentage			100.00%
Redemption at option of Company			At any time Expedia may redeem the 7.456% Notes at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium, in whole or in part.
5.95% Senior Notes Due 2020
Debt Instrument [Line Items]
Senior unsecured notes principal amount		$ 750,000,000	$ 750,000,000
Senior notes, maturity date			2020-08
Debt, interest rate		5.95%	5.95%		5.95%
Debt instrument redemption price percentage			100.00%
Redemption at option of Company			We may redeem the 5.95% Notes at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium, in whole or in part.
Senior notes issued price percentage		99.893%	99.893%		99.893%
5.95% Senior Notes Due 2020 \| Upon the occurrence of certain change of control triggering events
Debt Instrument [Line Items]
Debt instrument redemption price percentage			101.00%
2.5% Senior Notes Due 2022
Debt Instrument [Line Items]
Senior unsecured notes principal amount \| €					€ 650,000,000		€ 650,000,000
Senior notes, maturity date		2022-06
Debt, interest rate		2.50%	2.50%		2.50%
Debt instrument redemption price percentage		100.00%
Redemption at option of Company			We may redeem the 2.5% Notes at our option, at whole or in part, at any time or from time to time. If we elect to redeem the 2.5% Notes on or after March 3, 2022, we may redeem them at a redemption price of 100% of the principal plus accrued and unpaid interest. Subject to certain limited exceptions, all payments of interest and principal for the 2.5% Notes will be made in Euros.
Senior notes issued price percentage		99.525%	99.525%		99.525%
2.5% Senior Notes Due 2022 \| Upon the occurrence of certain change of control triggering events
Debt Instrument [Line Items]
Debt instrument redemption price percentage			101.00%
4.5% Senior Notes Due 2024
Debt Instrument [Line Items]
Senior unsecured notes principal amount		$ 500,000,000	$ 500,000,000
Senior notes, maturity date			2024-08
Debt, interest rate		4.50%	4.50%		4.50%
Debt instrument redemption price percentage			100.00%
Redemption at option of Company			We may redeem the 4.5% Notes at our option at any time in whole or from time to time in part. If we elect to redeem the 4.5% Notes prior to May 15, 2024, we may redeem them at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium. If we elect to redeem the 4.5% Notes on or after May 15, 2024, we may redeem them at a redemption price of 100% of the principal plus accrued interest.
Senior notes issued price percentage		99.444%	99.444%		99.444%
4.5% Senior Notes Due 2024 \| Upon the occurrence of certain change of control triggering events
Debt Instrument [Line Items]
Debt instrument redemption price percentage			101.00%
5.0% Senior Notes Due 2026
Debt Instrument [Line Items]
Senior unsecured notes principal amount		$ 750,000,000	$ 750,000,000
Senior notes, maturity date			2026-02
Debt, interest rate		5.00%	5.00%		5.00%
Debt instrument redemption price percentage			100.00%
Redemption at option of Company			We may redeem the 5.0% Notes at our option at any time in whole or from time to time in part. If we elect to redeem the 5.0% Notes prior to November 12, 2025, we may redeem them at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium. If we elect to redeem the 5.0% Notes on or after November 12, 2025, we may redeem them at a redemption price of 100% of the principal plus accrued interest.
Senior notes issued price percentage		99.535%	99.535%		99.535%
Senior notes, potential incremental interest			0.25%
5.0% Senior Notes Due 2026 \| Upon the occurrence of certain change of control triggering events
Debt Instrument [Line Items]
Debt instrument redemption price percentage			101.00%